Fuel-pump for semi-diesel engines.



W. B. SLAUGHTER, Jn. & R. A. GAERTNER. FUEL PUMP FOR SEMI-DIESELENGINES.

APPLICATION FILED OCT- 30| 1915- 1,260,724. Patented Mar. 26, 1918.

s SHEETS-snm 1.

#fron/vers:

W. B. SLAUGHTER, JR. da R. A.GAERTNEHI. FUEL PUMP FOR SEMI-DIESELENGINES.

*Y APPLICATION FILED 0CT|30|19|6 1,260,724. Patented Mar. 26, 1918.

3 SHEETS-SHEET 2.

WW@ E..

INVENTRJ:

#Trae/VE Ya.-

Patented Mar. 26, 1918.

3 SHEETS-SHEET 3.

WMM@

TTRNE'VS:

Wm WNW @MEW TME 5% W. B. SLAUGHTER, IR. & H. AI GAERTNER.

FUEL PUMP FOR SEMI-DIESEL-ENGINES.

APPLICATION FILED OCT-30.1916.

@MMV

y WILLIAM B. SLA'UGHTER, JR., AND RALPH A. GAERTNER, 0F LOS ANGELES,CALIFORNIA,

ASSIGNORS TO PETER E. SPELLACY, 0F LOS ANGELES, CALIFORNIA.

I Specification of Letters Patent.

FEL-PUMP FOR SEMI-DIESEL ENGINES.

Patented iuar. 2e, raie.

Application led October 30, 1916. Serial No. 128,609.

To all 'whom t may concern.

-Beit known that we, WILLIAM B. SLAUGH- TER, Jr., and RALPH A. GAERTNER,citizens of the United States, residing at os Angeles, in the county ofLos Angeles an State of California, have invented new and usefulImprovements in Fuel-Pumps for Semi-Diesel Engines, of which thefollowing is a speciication. r l

This inventionrelates to a fuel pump, and

particularly pertains to a pump for deliverf and independently adjustedduring the operation to bring all the cylinders to apdesired harmoniousefficiency.

Another object is to control a series of 011 prmps feeding a series-ofcylinders simul- 1 taleously by a speed operated governor and providemeans for independent manual adjustment of each pump so that thecylinders may be tuned or harmonized to a desired pitch or eiiciency andso that the energy ma be raised or lowered.

other object is to provide an adjustable timing mechanism -forharmonizing the action of the pumps with the action of the cylinders, asto exploding various oils.

Another object is to provide a simple operating mechanism which will actin synchronism with the movement of the engine pistons to deliver thefuel charge at a pre.-

determined interval.

Another object is to provide a simple pump control mechanism which maybe easily manipulated to vary the plunger stroke as the mechanism is inoperation.

Another object is to provide adjustable means for timing the pump inrelation to the lmovement of the englne pistons as required by thevarious grades of fuel used and the particular engine designed.

It is a further object to provide a pump and operating mechanismtherefor which is simple in its construction and which will prevent anyone of the fuel -pumps from delivering fuel when itis desired to'discontinue the combustion of fuel `within a corresponding' enginecylinder.

Other objects will appear hereinafter.

' The invention is illustrated, by way of example, in the accompanyingdrawings, in which:

Figure 1 is a lview in side elevation illustrating an 'engine of thesemi-Diesel type as fitted with the fuel-pump and adapted to receivefuel therefro Fig. 2 is an enlarged view in side eleva-A tionillustrating the complete pump and driving mechanism.

3 is a view in vertical section and elevation asseen on the line 3 3 ofFig. 2,

land illustrates the correlation existing between the various vitalelements of the pump mechanism.

Fig. 4 is a view in section as seen onA the line 4 4 of Fig. 3 andillustrates the eccentric pin formation.

Figl is a view in end elevation illustrating the arrangement of theeccentric portions on the eccentric in.

Referring more particularl to the ,drawings, 10 indicates the crank aftof a semi- Diesel engine Iwhich is provided with a-.series of cylinders11 adapted to be supplied with a liquid fuel through conduits 12 leadingfrom a fuel'pump 13 secured upon the cran case of the engine. The pumpis formed with a series of cylinders 14 `which correspond in number tothe cylinders of the engine and are in communication` therewith throughthe conduits 12. All of the cylinders are alike both as to constructionand operation.

Reference being had to Fig.. 3 of the drawings, i't will be seenv thatthe cylinder l14: is formed with a bore 15 adapted to receive acylindrical reciprocating plunger 16. This positioned around the plungerand between* plunger extends downwardly through a stuffing box17 andterminates at its lower .end Witha disk shaped head 1,8. The plunger isintended to normally be drawn downwardly by the action of' an expansioncoil spring 19 Vthe stuiing box and the head 18.

As a means for mechanicallyl lifting the plunger, a pushl rod 20 isprovided and reclprocates in alinement with the plunger 16 andtherebeneath. The pump frame isformed with a suitable bearing p 21 valong which the push rod may travel, an expansion spring being providedto maintain the plunger m its lowermost position as limited by,

rocker arm 23. The rocker arm 23 is piv- '1 otally mounted for verticalmovement upon a pivot shaft 24 secured to the pump frame. The armextends beneath the push rod 2O and receives motion imparted indirectlyfrom an oscillating arm 25. rlhe arm 25 is pivoted to the pump frameiupon a shaft 26 in vertical alinement with the shaft 24 and is fitted atits lower end with a roller 27. lllhis rangements of the cams' may bemade if deengine, al flange 30 being provided for thek sired. rllhesleeve is tubular and is adjust# ably fitted upon the crank shaft 10 Aofthe purpose. The flange 30 is formed with a series of perforations 31and slots32 through which cap screws 33 extend to engage 'ajrixed flange34 by whichl thesleeve is'driven. The

l ange 34 isformed'w'ith a series of threaded Y apertures through one ofwhich the set screw f 33 may extend to positively maintain theflanges 1na given relation to eachother. After the screw 33 has been placed inposij tion the lock screws 33 are tightened to prelvent furthermovement' of the -ilanges in relation to'each other. The flangel 34 issel cured byfa tapered pin 35 t0 the shaft 10,

although other securing means might be `found desirable.

As a means for varying `then-length of stroke made by the plunger whileIthe oscillating arm 25- describes la given movement,

-a slidable "Wedge 36 is" pivotally mounted upon an eccentric pinf37.secured at the end of the crank arm'38. Reference being lhad to Figs. 4and 5 itwill beseen that the pin 37 is `formed witha large head portion49 formed 'with aserrated edge adapted to engagev a stop pin 50 'whichis .detachably mounted: within the arm 38." Adjacent this head isacylindrical body .portion 52 con- I lcentric therewith andconcentrieally. ar'-v 1,aeo,724

ranged in relation'to avthreaded endA poran eccentric length is formedand adapted to 'register with the bore through the Wedge 36. It will beseen by this arrangement that ,the stroke of each pump, maybe'individually adjusted by rotating the eccentric pin to advance -orretard the Wedge 36. 'The tion 51. Between the portions 51 'and 52 arms38, one for each pump, extend down- `wardly from 4a shaft 39, to `whichthey are rigidly ixed, and the shaft 39 isadapted to be oscillated by asuitable mechanism se-- cured to the shaft, and actuated ,by the enginegovernor'. ,ln'this manner each Wedger 36 'may be advancedtoward andaway from the vertical axis of the pivot shafts 24 and thanthe distancebetween the adjacent iaces ofthe arms 23 and 25, the 'stroke Will bevaried, by manuall adjustment and by the action of the governor.

It'm'ay be found desirable to discontinue the operation'of one Vor morecylinders fof the engine and at such a time the uel supply may bestopped byA manipulation of a A lever 40 pivotally mounted upon a shaft41 adjacent the head 18 of the plunger `16. This lever is :formedwith abifurcated end portion 42 which spans the vplunger 20 -and 1s, adaptedtobear against the lower face of the head 18. Projections 42 areformed'on 26, 'and due to the fact that they are'wider .the lower facesof the biiurcated end portions of the lever 40. These projections nor- Ymally bear upon the face of the main casting or housing to which themechanism of the lapparatus is secured. 1n this manner limited in itsdownward travel and fwill thus limit the` downward movement of theplunger' 16 and the expansion of the plunger spring 19. A lock nut 43 isprovided to engage thefhandle of the lever 40 `and lhold it toprevent-the plunger 20 from -striking the head 18 of plunger 16 andactuating pump. Fuel is supplied the pumps by a conduit 44 whichconnects with `a fuel 'chamberv 45 A.formed upon a pump casing adjacentthe pumps. A' screen cup 46 is mounted within said chamber 'and.prevents uel'lsediment from passing into tubular stem 47 which"connects with the pump by" means of a connecting conduit 48. H'ilhevfuel passes from l the pump tothe engine through the conduit 12 anda'check valvel mountedfwithin the l ,pump head.

It will be ,understood that the foregoing description ofv the pumpoperating mechaf nism V1s confined to asingle pump unit and that a meremultiplication otthese units is required to accommodate a multiplecylinder. engine.

en the vengine isstarted the crankshaft 10 'is rotated and will in turnrotate `the "sleeve 2 9 whichfis secured to it `v`hv the 100 thebifurcatedpol'tion of Athe lever will be flanges 30 and 34. The sleeveis adjusted Y upon the shaft by means of the bolts 33 which extendthrough the slotted openmgs 32 in the fiange 30 and permitJ a limitedindependent rotatable movement of sleeve in relation to the crank as hasbeen previously described. This arrangement allows the fuel to beinjected 4into t-he cylinder at any predetermined interval in relationto the piston movement. As the sleeve rotates with the shaft theeccentrics 28 will successively oscillate the arm 25 and will impartniotion to the a'rm 23 by the stroke Wedge 36 inter-l posedtherebetween. As the arms move the wedge will oscillate upon the pivotpin 37 which has been adjusted to meet the fuel requirements of thecylinder. As the arm 23 is moved upwardly the lower push rod 20 will bereciprocated and will" engage the head 18 of plunger 16 to forceit'upwardly within the bore 15 and thus force the liquid fuel outthrough the valve 50 to the engine byway of the conduit 12. To increaseor decrease the volume of fuel delivered to the engine, the control arm38 is horizontally swung to move the wedge 36 toward the vertical axisof the pivot shafts 24 and 26 thus increasing the stroke of the piston.

' tive.

Especial attention is called to the means for adjustably timing theaction of the pumps relative tothe action of the cylinders, andcomprising the cam sleeve 29 carrying the pump driving cams 28, saidsleeve being loosely mounted upon the crank shaft '10,A the flange 34being/fixed upon the crank shaft and the ange 30 being fixed to thesleeve, and the flange 30 being adjustably connectedl to the flange 34by bolts through slots. This is an importantfeature. It provides meansfor adjustably timing all the pumps simultaneously to fit the actions ofthe cylinders, as to exploding various oils and as to the firing of thecharges. l

Attention is also called to the means for manually varying the effectivestroke of a and the coperating elements.

pump during its operation and consisting of the wedge 36 and theeccentric pin 37,

This construction, also provides manual means for independently varyingthe effective stroke' of each of a series of pumps connected to a seriesof cylinders and during the operation, so as to bring all the cylindersto a desired harmonious efficiency, and maintain that efficiency by aspeed controlled governor, and raise or lower the efficiency by manualadjustment at will.

We claim: v v

1. In an oil pump, a pump plunger,V a stufling box around the pumpplunger, a

I head upon .the lower lend of the pump plunger, a spring between thehead andthe stuffing box to withdraw the plunger, manually operatedmeans for holding the lunger against withdrawal, thereby cutting thepump out of action, a push-rod mounted in alinement with the plunger, aspring for moving the push-rod away fromlthe plunger, a rocker arm underthe push-rod, an oscillating arm below the rocker arm, means foroperating the oscillating arm, a slidable wedge between the oscillatingarm andl the rocker arm, and manually operated means for adjusting theposition of the slidable wedge so as to vary the stroke of the plunger.v

2. In an oil pump, a pump cylinder, a pump plunger mounted in thecylinder, a head upon the plunger outside of the cylinder, a push-rodengaging the head, means `for operating the push rod to operate theplunger, a spring pressing the p unger to ward the push rod, a leverpivotally mounted and connected to the head 'and adapted to limit theaction of the spring, and a lock for the lever; so that the lever may beoperated to raise the head and prevent withdrawal of theplunger,.thereby cutting the pump out of action.

' 3. In an oil pumpa series of ump cylinders vertically mounted and discarging upwardly, pump plungers mounted in the cyllos inders andextending downwardly, heads upon the lovver'ends of the plungers,springs between the heads and the cylinders to withdraw the plungers,push-rods mounted in vertical alinement below the heads and engaging theheads, means for operating the push-rods to operate the plungers, leverspivotally mounted and connected to the `heads and adapted to limit thewithdrawal strokes of theplungers, and an independent means for eachlever for holding the lever to hold Vthe plunger against withdrawal sothat each plunger may be independently operated to cut the pump to whichit belongs outof action. v

4. In an oil pump, a series of pump cylinders vertically mounted anddlschargmg upwardly, a pump plunger for each cylinder and extendingdownwardly; a', springl for .withdrawing each plunger, a push-rod foradvancing each plunger, a spring for withdrawing each push-rod, a rockerarm underl as l mamma each push'-ro`d, an oscillating arm below byoperatin the shaft; and meansforindeeach rocker arm, means for'operatingthe `pendently ajusting the connections between 1o oscillating armssimultaneously, a slidable the arms and the sliding Wedges so asto Wedgebetween each oscillating arm and the vary the strokes of the pumpplungers. f corresponding rocker arm, an oscillating In testimonywhereof we have signed our shaft, arms -fixed upon the oscillatingshaft, names to this specication.

one for each sliding wedge; so that the slid WILLIAM B. SLAUGHTER, JR.

ing wedges may be simultaneouslyloperated RALPH A. GAERTNER.

